Change the initialization time of Radio button's isChecked (#1312)

* Change the initialization time of Radio button's isChecked

* Rollback checkDefaultBitShift and Use Enum instead of String

* Fix Check Default
- In previous versions, there was an issue where button availability was reset when opening BitShift Flyout not when the mode is changed

* Reset Calculator Type in Calculator ViewModel when mode change to not Calculator mode

* Revert "Reset Calculator Type in Calculator ViewModel when mode change to not Calculator mode"

This reverts commit a0d2f84513bc2d36fea3d75445782e1c67bc2e8d.

* Check deferred load button

src/Calculator/Views/OperatorsPanel.xaml.cpp

@@ -72,10 +72,7 @@ void OperatorsPanel::EnsureProgrammerRadixOps()
         this->FindName(L"ProgrammerRadixOperators");
     }
 
-    if (ProgrammerRadixOperators)
-    {
-        ProgrammerRadixOperators->checkDefaultBitShift();
-    }
+    ProgrammerRadixOperators->checkDefaultBitShift();
 }
 
 void OperatorsPanel::EnsureProgrammerBitFlipPanel()